Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0f12f422e5fc411…

MALICIOUS

PDF

85.1 KB Created: 2021-03-07 06:18:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ff9ead957770386aad6b7060a3b4f133 SHA-1: 996b3f65c91b5931d61f02a56296e9f0c13a594a SHA-256: e0f12f422e5fc411b3673bf61639e4d2151ae4cad697674e0d497cd7a5141db7
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://crophysi.ru/wix?keyword=rental+properties+greenville+al PDF link annotation
    • https://cdn.sqhk.co/xataruzepape/gfePRgh/ding_ding_dong_christmas_song.pdfIn PDF document text
    • http://zosujobitusup.iblogger.org/sibopuluvizigofu.pdfIn PDF document text
    • http://pevokepavaxe.iblogger.org/63997534790.pdfIn PDF document text
    • http://gakagebir.mypressonline.com/13372004386.pdfIn PDF document text
    • http://ninomut.sportsontheweb.net/acer_aspire_e15_review_philippines.pdfIn PDF document text
    • http://bibopasaxuvibu.mypressonline.com/dujowibuwanuzidusofejubig.pdfIn PDF document text
    • https://cdn.sqhk.co/pajokiman/hbbgghf/82873449674.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dilutibu.onlinewebshop.net/kusovixijelurawatigaves.pdfIn PDF document text
    • http://zexukojol.rf.gd/jegumimisawemojozefafub.pdfIn PDF document text
    • http://pabiluset.epizy.com/35743495929.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ae172c8-cc37-43a5-b4db-348ab29d35bd/how_do_you_adjust_a_ranco_thermostat.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/4046274701.pdfIn PDF document text
    • https://s3.amazonaws.com/vibasujefir/fractions_worksheets_gcse_maths.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5aab64bd-acba-4839-859f-35fef6aa240f/zazesamevinisopi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58d32b50-cc6d-4a44-9468-073d2ac73bbb/arithmetic_and_geometric_sequences_practice_worksheet_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55d694de-c842-4030-be58-719555b34f21/xuvimetonabuwosaxenu.pdfIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/little_mix_touch_acoustic_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/megulu/4394697153.pdfIn PDF document text
    • https://s3.amazonaws.com/pusixa/dolowika.pdfIn PDF document text
    • http://pitefabe.epizy.com/24995134815.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1cb13d1-30a8-4e7e-96d0-22286e0c0179/61376068006.pdfIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/good_credit_score_canada_transunion.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000110f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110F3 5052 bytes
SHA-256: 2d775f92cff21b73d6c3fba6d005a1acb410ab2d8109a126b2b2a5983e98c0a9
font_01_sfnt_off00012241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12241 10716 bytes
SHA-256: ffdc2053831eca44e6d7654002defedd18287b645f9d11bde79c2f2aedd4ecee

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